Question

I have a IList<Customer> and I want to find a customer whose lastname=’smith’. how do i do that? The .where looks like it might work but I don’t understand the predicate needed to do this. Or is there a better way to search the list?

Thanks,
rod.

Answer 1

If you want the first customer which his last name is ‘smith’, use FirstOrDefault

var customer = customerList.FirstOrDefault(c => c.LastName == "smith");

if (customer != null)
  // do code;

And If you want all the customers which their last name is ‘smith’, use Where:

var customers = customerList.Where(c => c.LastName == "smith");

foreach(var customer in customers)
  // do code;

Good luck!